noun Etymology: International Scientific Vocabulary Date: 1884 1. the initial stage of mitosis and of the mitotic division of meiosis characterized by the condensation of chromosomes consisting of two chromatids, disappearance of the nucleolus and nuclear membrane, and formation of mitotic spindle 2. the initial stage of the first division of meiosis in which the chromosomes become visible, homologous pairs of chromosomes undergo synapsis and crossing over, chiasmata appear, chromosomes condense with homologues visible as tetrads, and the nuclear membrane and nucleolus disappear — compare diakinesis, diplotene, leptotene, pachytene, zygoteneprophasic adjective

New Collegiate Dictionary. 2001.

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  • Prophase — Prophase, from the ancient Greek πρό (before) and φάσις (stage), is a stage of mitosis in which the chromatin condenses (it becomes shorter and fatter) into a highly ordered structure called a chromosome in which the chromatin becomes visible.… …   Wikipedia

  • prophase — [ profaz ] n. f. • 1887; de pro et phase ♦ Biol. Première phase de la division cellulaire (méiose ou mitose) où les chromosomes s individualisent en filaments fissurés longitudinalement, et se disposent par paires de chromosomes homologues. ●… …   Encyclopédie Universelle

  • prophase — 1884, from Ger. prophase (1884); see PRO (Cf. pro ) + PHASE (Cf. phase) …   Etymology dictionary

  • prophase — prophase. См. профаза. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Prophase — Prophase, 1. Phase der ⇒ Mitose und der ⇒ Meiose …   Deutsch wörterbuch der biologie

  • prophase — [prō′fāz΄] n. [ PRO 1 + PHASE1] the first stage in mitosis, during which the chromatin is formed into chromosomes which split into separate paired chromatids …   English World dictionary

  • Prophase — Schematische Darstellung der Mitose I: Interphase; II: Prophase; III: Prometaphase; IV: Metaphase; V und VI: Anaphase; VII: Telophase; VIII: Zytokinese Als Mitose (zu griechisch μίτος = Faden) (auch Karyokinese) bezeichnet man den Vorgang der …   Deutsch Wikipedia

  • Prophase — La prophase est la première phase de la division cellulaire (mitotique comme méiotique) chez les êtres vivants eucaryotes. Lors de cette phase, le matériel génétique (ADN), qui en temps normal est présent dans le noyau sous la forme de chromatine …   Wikipédia en Français

  • prophase — The first stage of mitosis or meiosis, consisting of linear contraction and increase in thickness of the chromosomes (each composed of two chromatids) accompanied by migration of the two daughter centrioles and their asters toward the poles of… …   Medical dictionary

  • Prophase — Pro|pha|se 〈f. 19〉 einleitende Phase der Kernteilung, in der die Chromosomen sichtbar werden [<lat. pro „vor, vorher“ + Phase] * * * Pro|pha|se, die [aus griech. pró = vor u. ↑ Phase] (Biol.): erste Phase der indirekten Kernteilung. * * *… …   Universal-Lexikon

  • prophase — n. the first stage of mitosis and of each division of meiosis, in which the chromosomes become visible under the microscope. The first prophase of meiosis ocurs in five stages (see leptotene, zygotene, pachytene, diplotene, diakinesis) …   The new mediacal dictionary

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